Low field NMR hard pulse sequence(Spin Echo)

Low field NMR hard pulse sequence(Spin Echo)

The low field NMR hard pulse sequence (Spin Echo) is excited by hard pulse radio frequency.

Pulse sequence diagram

Low field NMR hard pulse sequence(Spin Echo) parameters:

RF: triggering timing sequence of RF pulses;

Rx: receiving timing sequence of nuclear magnetic signal;

P90: 90 degree pulse width;

P180: 180 degree pulse width;

Tr: Waiting time for repeated sampling, namely the time between the end of the previous sampling and the beginning of the next sampling;

τ : half-echo time;

D3: The time interval between the end of the radio frequency at 180 degrees and the beginning of the signal acquisition.